garmin gps 18 lvc as a reference clock on freebsd

» satellites tracked

The Garmin GPS 18 LVC is WAAS enabled (though this is not supported in Australia) and has a 12 parallel channel receiver tracking up to 12 satellites at one time. The chart below shows the number of satellites being tracked by the receiver.

» offset

The charts below show the time offset between the receiver and the system clock.

» jitter

The chart below shows the estimated time error of the system clock measured as an exponential average of RMS time differences.